An Easter egg, as it relates to movies, is when the movie's creators hide something in the film that's an intentional inside joke.

John Lasseter, cofounder of Pixar and now overseer of all animation projects at Disney, is no stranger to the Easter egg world. Both of the companies he's led, particularly Pixar, have included dozens of Easter eggs in their movies. For instance, nearly every Pixar movie is known to include a hidden Pizza Planet truck from "Toy Story."

Other Easter eggs are based on real-world locations. There are obvious ones — in the beginning of the 2006 movie "Cars," the announcer says the entire town of Emeryville will be closed for the race; Pixar Studios is in Emeryville, California — but some Easter eggs aren't so obvious.

Keep reading to see more real-life Easter eggs in Disney and Pixar films.

Karyne Levy contributed to a previous version of this story.

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References to A113.

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Perhaps the most famous of all the Pixar Easter eggs are references to A113. References to A113 can be found in all Pixar movies, some Disney movies, and even in "The Simpsons" and other animated shows and films. References to A113 can also be found in video games. Chances are, if an alum from the California Institute of the Arts is somehow involved, A113 will be included in the animation.

That's because A113 is the classrooms used by the graphic design and animation students at the school, including John Lasseter.

The real CalArts is located in Southern California.

Fenton's Creamery in Pixar's "Up" is located in Oakland, California.

At the end of the movie, Russell and Carl can be seen eating an ice cream cone on the sidewalk in front of Fenton's Creamery.

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The real Fenton's is a local favorite, located on Piedmont Avenue in Oakland.

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The ice cream shop opened in 1894, and moved to its current location in the 1960s. It also claims to be where Rocky Road ice cream was born.

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The Grand Lake Theater in "Up" can be found in Oakland, California.

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During the credits sequence, we see a photo of Carl and Russell going to see "Star Wars."

This Easter egg is two-fold: many speculate that this was foreshadowing a new "Star Wars" film. In 2012 — three years after "Up" came out — Disney announced it would release a new "Star Wars" movie in 2015.

As for the location ...

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The movie theater marquee at the end of "Up" is actually the Grand Lake Theater in Oakland.

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It opened in 1926, and in 1981 the theater and its gigantic rooftop sign were designated historical landmarks. From this angle, you can't see the enormous rooftop sign.

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The famous "Up" house is thought to be on Sixth Street in Berkeley, California.

The director of the movie found inspiration for the famous house in a home he drove by on his way to work every day.

The Victorian-style house is well-known in the Bay Area. SF Gate's Peter Hartlaub asked the filmmakers at the time about which house in particular inspired the "Up" house, but neither of them would give him an exact address. He did some sleuthing and determined that the house was probably somewhere on Sixth Street in Berkeley.

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The ZIP code of San Carlos, California, is on a court summons in "Up."

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Carl is forced by the court to move out of his house and into a retirement home. When he goes to court, he's holding a court summons.

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The number on the summons — 94070 — is the ZIP code for San Carlos, a town about 45 minutes away from Pixar Studios.

Pete [Docter, the film's director] and I, when we work on a film, we go almost every week at night (to Merritt Bakery) to sit at the counter and eat cake and talk about the movie. One of the things we saw over there was the burger cake — it's shaped like a hamburger. We thought 'That is so ridiculous,' so we made it a trend to buy that for our crew meetings. And one of Russell's badges is a burger cake. There's some Oakland love in the movie.

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Merritt Bakery is near Lake Merritt in Oakland. In 2013, it was gutted by a fire, but the bakery survived — and so did the hamburger cake. (And if you ever end up at Merritt Restaurant, the chicken and waffles are delicious.)

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The Hidden City Cafe in Point Richmond, California, is where the ideas for several Pixar movies were born.

Here's the map to Al's Toy Barn in "Toy Story 2." You can see 1001 W. Cutting Boulevard, as well as the 880 and 580 freeways, which are both in the East Bay.

"Big Hero 6" is set in a mashup of San Francisco and Tokyo, called San Fransokyo. But that's not all.

Disney

Yes, pretty much everywhere in "Big Hero 6" is an homage to a place that exists in real life, and that's by design. "We don't claim you can find your house," the film's technical supervisor, Hank Driskill, told Gizmodo. "But if you go to where your house is, you'll find the right building of the right size."

Over the shoulder of the officer, there's a piece of paper on the bulletin board that uses 628 as the area code. New phone numbers issued in San Francisco and Marin will use this area code starting in 2015.